HP 19 All-in-One Desktop PC Intel Celeron 2.41GHz 4GB 500GB DVDRW WiFi 19.5 Windows 8.1 Intel Celeron J1800 processor 2.41GHz (2.58 GHz max turbo boost), 1MB Cache 4GB DDR3 SDRAM system memory (expandable to 8GB), 500GB SATA hard drive 19.5 High-definition LCD backlit display, with 1600X900 resolution, built-in speaker, webcam and microphone Slim-tray SuperMulti DVD Burner, 10/100/1000Base-T Ethernet, 802.11b/g/n Wireless LAN, 4 USB 2.0, 1 USB 3.0, Memory card reader Windows 8.1 64 bit, widows 10 up-gradable.